I think most of your mixes has got potential, you’ve got a good sense for melodies and the compositions are very contemporary. If I’m allowed to give a few tips, you have to start using the mastering function of your DAW to bring up the mix and add more oomph to it, perhaps even use the limiter so you can maximize your tracks the way the mastering studios does nowadays for the genres you’re moving within. I also suggest you compress every individual track to add some additional power to them.